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#include#include #include #include using namespace std; typedef long long int ll; int main(){ ll l,r; ll a,b; ll m; ll num; ll k; scanf("%I64d%I64d%I64d",&a,&b,&k); l=1; r=a*b; while(l >1; for(ll i=1;i<=a;i++){ num+=min(m/i,b); } if(num